Saw jointer



Jan. 3, 1956 J. McEWAN SAW JOINTER Filed Oct. 6, 1953 United StatesPatentO 2,729,120 SAW 10mm; James McEwan, San e, Ca Application October6, 1953, Serial No. 384,463

4 Claims. (CI. 76-47) The present invention is concerned with sawjointers, and relates more particularly to an improved constructionwhich is easy to use and which facilitates the installation and use ofeither a triangular file or a flat file.

It is a general object of the invention to provide an improved sawjointer which is convenient to use and hold in the hand, which providesfor engagement with the side of a saw to hold its teeth in position, forjointing, and which is economical to manufacture and easy to use.

Another object of the invention is to provide a saw jointer of the abovecharacter in which either triangular or fiat files can be employed,without change in the construction.

Other objects and advantages of the invention will become apparent fromthe following description of a preferred embodiment as illustrated inthe accompanying drawings, in which:

Figure 1 is an elevational view of the jointer illustrating the jointerheld in relation to a saw.

Figure 2 is an end elevational view of the jointer.

Figure 3 is a bottom plan view with certain parts shown in section.

Figure 4 is a fragmentary view of the file-holding ele ment showing aflat file in place against the element.

Figure 5 is an end elevational view similar to Figure 2, but showing afiat file in place in the jointer.

Referring to the drawings, the jointer includes a hollow body having asubstantially T-shaped recess 11 extending therethrough, the bar of theT providing for mounting of a file holder 12 having a file 13 mountedtherein, and the leg of the T being narrow and providing an opening orslot 15 for receiving a saw blade 14. The file holder 12 is pivotallymounted in the body by means of pivot pins 16 which are pressed inbosses 17 of the body and are journalled in bearing portions 18 of thefile clamping member or holder 12. At the side opposite to its pivotalmounting, the file holder 12 is provided with a slotted extension 19 inwhich a screw 21 is pivotally secured by means of a pin 22. The screw 21extends through an aperture in the body 10 and receives a knurledclamping nut 23, a compression spring 24 being provided about the screw21 and interposed between a fiat surface 26 of the body and the slottedextension 19 of the file holder 12. Thus the file holder is spring urgedaway from active position and can be moved into active file holdingposition by adjustment of the screw 23.

In order to provide for selective mounting of either a flat ortriangular file, the file holder is provided with a V-shaped recess 27extending longitudinally thereof and having a pair of flat surfaces 28at either side of the V-shaped recess. When a triangular file is to beused, it is engaged with the V-shaped locating recess 27 and the nut 23is tightened to clamp it in place over the saw receiving slot betweenthe two opposed walls 31 of the body member 10. When a flat file 13a isto be used 2,729,120 Patented Jan. 3, 1956 2 as shown in Figure 5, thetwo surfaces 28 engage the flat file and press it against the flat walls26 within the body. Thus either a. triangular or a flat file can besecurely clamped in place in the jointer.

In order to maintain the saw blade in position in the jointer to insurethe tops of the teeth being jointed square with the saw, a positioningmember 36 is provided having an extension 37 which projects through aslot 38 in one of the Walls 31 and has a saw engaging face substantiallyparallel to the opposed wall 31. The positioning member may be made ofwax-impregnated fiber to reduce friction. The member 36 is pivotallymounted by a screw 41 in a pair of vertically spaced apart ear portions42 of the body, and the member 36 is recessed at 43 to receive acompression spring 44 by means of which it is urged to inactiveposition. A pair of ear portions 42 are provided at each end of the bodyso that the member 36 can be reversed in position when the saw jointeris used by a left-handed person as compared with the position shown,which is proper for a righthanded person.

While I have shown a preferred embodiment of the invention, it will beapparent that the invention is capable of variation and modificationfrom the form shown, so that the scope thereof should be limited only bythe scope of the claims appended hereto.

I claim:

1. In a saw jointer comprising a substantially T-shaped body having asubstantially T-shaped recess therein including a bar portion and anarrow leg of the recess extending from the bar portion of the recess toone side of the jointer and forming a saw receiving slot, the barportion of said T-shaped recess having a flat file engaging surface atthe inner end of said slot, a file clamping member movably mounted insaid body at one side of the bar portion of said recess and extendingacross said slot, spring means urging said member away from said slot,an adjusting member for' urging said clamping member to clampingposition, said clamping member having a V-shaped recess therein inalignment with said slot and a flat file engaging surface at either sideof the recess, whereby a flat file or a triangular file can beselectively clamped in said jointer.

2. In a saw jointer, a body having an enlarged portion shaped to begripped by the hand of a person, a transverse opening extendinglongitudinally through said enlarged portion, and opposite wall membersprojecting outwardly from said wall portion in a direction away fromsaid enlarged portion, said spaced wall portions forming therebetween asaw receiving slot, a file clamping member pivoted along one edge ofsaid enlarged portion and extending across the opening therein tooverlap said saw receiving slot, and adjusting means connected to saidpivoted member and extending outside of said body on the side thereofopposite to the pivotal mounting of said clamping member.

3. In a saw jointer, a body having an enlarged portion shaped to begripped by the hand of a person, a transverse opening extendinglongitudinally through said enlarged portion, and opposite wall membersprojecting outwardly from said wall portion in a direction away fromsaid enlarged portion, said spaced wall portions forming therebetween asaw receiving slot, a file clamping member pivoted along one edge ofsaid enlarged portion and extending across the opening therein tooverlap said saw receiving slot, said member having a V-shaped recessextending parallel to said slot and a surface at either side of saidrecess, and adjusting means connected to said pivoted member andextending outside of said body on the side thereof opposite to thepivotal mounting of said clamping member.

4. A saw jointer comprising a substantially T-shaped body having asubstantially T-shaped recess therein including a bar portion and anarrow leg of the recess extending from the bar portion of the recess toone side of the jointer and forming a saw receiving slot, the barportion of said T-shaped recess having a fiat file engaging surface atthe inner end of said slot, a file clamping member movably mounted insaid body and extending across said slot, said clamping member having aV fiat file engaging surface at either side of the recess,

one wall of said slot having an elongated opening formed therein, and anelongated positioning member pivotally mounted at one end of saidopening for engagement with a saw in said slot under manual pressure ofa 5 person grasping said jointer in his hand.

References Cited in the file of this patent UNITED STATES PATENTS

